US4991292A - Method of producing elastomeric stators for eccentric helical pumps - Google Patents

Method of producing elastomeric stators for eccentric helical pumps Download PDF

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Publication number
US4991292A
US4991292A US07/387,293 US38729389A US4991292A US 4991292 A US4991292 A US 4991292A US 38729389 A US38729389 A US 38729389A US 4991292 A US4991292 A US 4991292A
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US
United States
Prior art keywords
stator
casing
cavity
diameter
reducing
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
US07/387,293
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English (en)
Inventor
Karl-Heinz Bostel
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jaeger Gummi GmbH and Co KG
Original Assignee
Jaeger Gummi GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Jaeger Gummi GmbH and Co KG filed Critical Jaeger Gummi GmbH and Co KG
Assigned to GUMMI-JAGER KG GMBH & CIE reassignment GUMMI-JAGER KG GMBH & CIE ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: BOSTEL, KARL-HEINZ
Application granted granted Critical
Publication of US4991292A publication Critical patent/US4991292A/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/10—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member
    • F04C2/107—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth
    • F04C2/1071—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type
    • F04C2/1073—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of internal-axis type with the outer member having more teeth or tooth-equivalents, e.g. rollers, than the inner member with helical teeth the inner and outer member having a different number of threads and one of the two being made of elastic materials, e.g. Moineau type where one member is stationary while the other member rotates and orbits
    • F04C2/1075—Construction of the stationary member
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/005—Compensating volume or shape change during moulding, in general
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49238—Repairing, converting, servicing or salvaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49229—Prime mover or fluid pump making
    • Y10T29/49236—Fluid pump or compressor making
    • Y10T29/49242—Screw or gear type, e.g., Moineau type

Definitions

  • the invention relates to a method of producing an elastomeric stator for an eccentric helical pump, with a core being used to mold a stator cavity that serves for accommodating a pump rotor.
  • the present invention furthermore proceeds further from such stators that on the outside are provided with a metallic casing that is generally made of steel or a similarly strong material.
  • the phrase elastomeric stators refers to stators in which that portion that delimits the cavity is made of rubber or a rubber-like synthetic material.
  • the elastomer is introduced, for example, by injection. After the molding process, the material is cured or vulcanized. The material is then generally cooled off, whereby a shrinkage occurs that is a function of several factors, including the nature of the material itself.
  • FIG. 1 is a vertical cross-sectional view through an injection mold for molding stators
  • FIG. 2 is a vertical cross-sectional view through a drawing die and a stator that has already partially been handled thereby;
  • FIG. 3 is a cross-sectional view through a stator, with the upper half showing the cooled and shrunk state, and the lower half showing the finished state.
  • the method of the present invention is characterized primarily by molding an oversized stator cavity, i.e. one that is larger than finally desired, and then reducing the size of the stator cavity to a desired dimension by reducing the diameter of a closed, hollow-cylindrical casing, accompanied by permanent deformation of the casing.
  • a core that is too thick is therefore intentionally used for molding the stator.
  • a permanent deformation of the metallic stator casing is undertaken by reducing the diameter thereof to the desired extent. This can be accomplished by continuous drawing, for example using a stationary drawing die.
  • a corresponding compression of the elastomer that is surrounded by the casing there is effected a corresponding compression of the elastomer that is surrounded by the casing, accompanied by a reduction of the cavity.
  • inventive method could also be used to recondition stators that have become unusable due to wear.
  • a precondition for this is that a closed stator casing always be used, because only such a casing can exert and maintain the forces necessary for reducing the size of the cavity.
  • the present invention utilizes the potential of reducing the diameter of closed, cylindrical metal casings and the processing thereof by continuous drawing, whereby the tooling can be moved relative to the stator, or the stator could even be moved relative to the tooling.
  • the hollow cylindrical mold 1 has a centrally disposed core 2, the outer contour of which corresponds to the desired hollow space or cavity 3 of the stator, although with the restriction that it mold a cavity 3 that is approximately 0.2-3% wider or larger than the finished stator cavity is to be.
  • the cylindrical, one-piece, unsplit steel sleeve or casing 4 disposed on the outer surface of the mold cavity.
  • the rubber disposed between the casing 4 and the core 2 forms the actual stator body.
  • the rubber is vulcanized and can then cool off, whereby it experiences a certain amount of shrinkage or contraction, which is a function of the material.
  • the final or finished size of the stator is then determined by the matrix or die 6, which is to be precisely designed and through which the stator, which is moved in the axial direction, is forced.
  • the outer diameter D is reduced in conformity with the size of the die 6.
  • certain compressive and radial forces that permit the width B to become the smaller width "b", and the greater radii R to become the smaller radii "r”.
  • the reduction in diameter can be approximately 0.1-1.5% of the original diameter D. This reduction in diameter does not reverse itself because a permanent deformation of the casing 4 has taken place.
  • the permanent deformation that is to be used, and the reduction in diameter that depends thereupon, must be determined as a function of the material.
  • the important thing is that the precision of the diameter D is not particularly crucial, because the chucks that are used to accommodate the stators can be adapted to. Thus, if it becomes necessary to have varying outer diameters in order to achieve precise inner dimensions for different materials, this does not result in a drawback.
  • the stator body 5 is fixedly connected to the inner surface of the casing 4. Due to the geometry of an eccentric helical pump, the pump cavity (cavity 3) also has a shape that, when viewed in cross-section, is defined by two semicircles and a rectangle (dimensions R or "r” and B or "b", with the width always being equal to twice the radius).

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)
  • Manufacture Of Motors, Generators (AREA)
US07/387,293 1988-07-30 1989-07-28 Method of producing elastomeric stators for eccentric helical pumps Expired - Fee Related US4991292A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3826033 1988-07-30
DE3826033A DE3826033A1 (de) 1988-07-30 1988-07-30 Verfahren zur herstellung von elastomerstatoren fuer exzenterschneckenpumpen

Publications (1)

Publication Number Publication Date
US4991292A true US4991292A (en) 1991-02-12

Family

ID=6359970

Family Applications (1)

Application Number Title Priority Date Filing Date
US07/387,293 Expired - Fee Related US4991292A (en) 1988-07-30 1989-07-28 Method of producing elastomeric stators for eccentric helical pumps

Country Status (5)

Country Link
US (1) US4991292A (enrdf_load_stackoverflow)
EP (1) EP0353553B1 (enrdf_load_stackoverflow)
JP (1) JPH02112683A (enrdf_load_stackoverflow)
AT (1) ATE104748T1 (enrdf_load_stackoverflow)
DE (2) DE3826033A1 (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6162032A (en) * 1998-02-04 2000-12-19 Artemis Kautschuk- Und Kunststofftechnik Gmbh & Cie Elastomeric stator for eccentric spiral pumps
US6170572B1 (en) 1999-05-25 2001-01-09 Delaware Capital Formation, Inc. Progressing cavity pump production tubing having permanent rotor bearings/core centering bearings
US6336796B1 (en) * 1999-06-07 2002-01-08 Institut Francais Du Petrole Progressive-cavity pump with composite stator and manufacturing process
US6543132B1 (en) 1997-12-18 2003-04-08 Baker Hughes Incorporated Methods of making mud motors
US6568076B2 (en) * 1998-06-05 2003-05-27 Halliburton Energy Services, Inc. Method of making an internally profiled stator tube
US20030150098A1 (en) * 2002-02-08 2003-08-14 Mckay John Russell Method of removing stators from tubular stator housings
US20060153724A1 (en) * 2005-01-12 2006-07-13 Dyna-Drill Technologies, Inc. Multiple elastomer layer progressing cavity stators
US20110058930A1 (en) * 2009-09-04 2011-03-10 Robbins & Myers Energy Systems L.P. Motor/pump with spiral wound stator tube
US20110070111A1 (en) * 2009-09-23 2011-03-24 Halliburton Energy Services, Inc. Stator/rotor assemblies having enhanced performance
WO2015172751A1 (zh) * 2014-05-15 2015-11-19 华南理工大学 一种偏心转子体积脉动形变塑化输运方法与装置
US20160186747A1 (en) * 2013-03-05 2016-06-30 Smith International, Inc. Method and Apparatus to Manufacture a Progressive Cavity Motor or Pump
US9393648B2 (en) 2010-03-30 2016-07-19 Smith International Inc. Undercut stator for a positive displacment motor
US9610611B2 (en) 2014-02-12 2017-04-04 Baker Hughes Incorporated Method of lining an inner surface of a tubular and system for doing same
CN109538112A (zh) * 2019-01-04 2019-03-29 中国地质大学（北京） 一种套装拼接式全金属螺杆定子及其加工方法
US10844663B2 (en) 2012-02-21 2020-11-24 Smith International, Inc. Fiber reinforced elastomeric stator
US11148327B2 (en) 2018-03-29 2021-10-19 Baker Hughes, A Ge Company, Llc Method for forming a mud motor stator

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4323759A1 (de) * 1993-07-15 1995-01-19 Artemis Kautschuk Kunststoff Verfahren zur Herstellung von Rotoren für Exzenterschneckenpumpen
DE19754818A1 (de) * 1997-12-10 1999-06-17 Artemis Kautschuk Kunststoff Verfahren zur Herstellung von Elastomerstatoren für Exzenterschneckenpumpen
DE102014116327A1 (de) * 2014-11-10 2016-05-12 Netzsch Pumpen & Systeme Gmbh Verfahren zur Herstellung eines gewendelten Stators und Vorrichtung zur Herstellung eines gewendelten Stators
DE102019005367B4 (de) * 2019-07-31 2023-01-19 Pumpenfabrik Wangen Gmbh Verfahren zur Herstellung eines Statorbauteil für eine Exzenterschneckenpumpe, Statorbauteil und Exzenterschneckenpumpe

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857654A (en) * 1972-01-21 1974-12-31 Streicher Foerdertech Adjustable diameter stator for excentric helical screw pump
US4232541A (en) * 1979-01-23 1980-11-11 The Babcock & Wilcox Company Drawing technique
US4338068A (en) * 1980-05-22 1982-07-06 Massachusetts Institute Of Technology Injection molding device and method

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE7344188U (de) * 1974-04-18 Kaechele W Kautschuk Und Kunststoffwarenfabrik Stator mit Spannvorrichtung
DE2930068A1 (de) * 1979-07-25 1981-03-19 Kurt-Joachim 3000 Hannover Ganz Exzenter-schnecken-verdraengungspumpe
EP0083829A1 (en) * 1982-01-11 1983-07-20 Eugene F. Kopecky Adjustable pressure extrusion pump
DE3218714C2 (de) * 1982-05-18 1986-02-27 Kurt-Joachim 3000 Hannover Ganz Stator für Exzenterschneckenpumpen
DE3615795A1 (de) * 1986-05-10 1987-11-12 Jaeger Arnold Verfahren zur herstellung von exzenterschneckenpumpen
DE3619787A1 (de) * 1986-06-12 1987-12-17 Gummi Jaeger Kg Gmbh & Cie Stator fuer exzenterschneckenpumpen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3857654A (en) * 1972-01-21 1974-12-31 Streicher Foerdertech Adjustable diameter stator for excentric helical screw pump
US4232541A (en) * 1979-01-23 1980-11-11 The Babcock & Wilcox Company Drawing technique
US4338068A (en) * 1980-05-22 1982-07-06 Massachusetts Institute Of Technology Injection molding device and method

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6543132B1 (en) 1997-12-18 2003-04-08 Baker Hughes Incorporated Methods of making mud motors
US6162032A (en) * 1998-02-04 2000-12-19 Artemis Kautschuk- Und Kunststofftechnik Gmbh & Cie Elastomeric stator for eccentric spiral pumps
US6568076B2 (en) * 1998-06-05 2003-05-27 Halliburton Energy Services, Inc. Method of making an internally profiled stator tube
US6170572B1 (en) 1999-05-25 2001-01-09 Delaware Capital Formation, Inc. Progressing cavity pump production tubing having permanent rotor bearings/core centering bearings
US6336796B1 (en) * 1999-06-07 2002-01-08 Institut Francais Du Petrole Progressive-cavity pump with composite stator and manufacturing process
USRE42416E1 (en) 2002-02-08 2011-06-07 Mckay John Russell Method of removing stators from tubular stator housings
US20030150098A1 (en) * 2002-02-08 2003-08-14 Mckay John Russell Method of removing stators from tubular stator housings
USRE44403E1 (en) 2002-02-08 2013-08-06 Millennium Cryogenic Technologies Ltd. Method of removing stators from tubular stator housings
US6973707B2 (en) * 2002-02-08 2005-12-13 Mckay John Russell Method of removing stators from tubular stator housings
US20060153724A1 (en) * 2005-01-12 2006-07-13 Dyna-Drill Technologies, Inc. Multiple elastomer layer progressing cavity stators
EP1693571A3 (en) * 2005-01-12 2006-10-04 Dyna-Drill Technologies Inc. Multiple elastomer layer progressing cavity stators
US7517202B2 (en) 2005-01-12 2009-04-14 Smith International, Inc. Multiple elastomer layer progressing cavity stators
US20110058930A1 (en) * 2009-09-04 2011-03-10 Robbins & Myers Energy Systems L.P. Motor/pump with spiral wound stator tube
US20110070111A1 (en) * 2009-09-23 2011-03-24 Halliburton Energy Services, Inc. Stator/rotor assemblies having enhanced performance
US8734141B2 (en) 2009-09-23 2014-05-27 Halliburton Energy Services, P.C. Stator/rotor assemblies having enhanced performance
US9393648B2 (en) 2010-03-30 2016-07-19 Smith International Inc. Undercut stator for a positive displacment motor
US10844663B2 (en) 2012-02-21 2020-11-24 Smith International, Inc. Fiber reinforced elastomeric stator
US20160186747A1 (en) * 2013-03-05 2016-06-30 Smith International, Inc. Method and Apparatus to Manufacture a Progressive Cavity Motor or Pump
US10309395B2 (en) * 2013-03-05 2019-06-04 Smith International, Inc. Method and apparatus to manufacture a progressive cavity motor or pump
US9610611B2 (en) 2014-02-12 2017-04-04 Baker Hughes Incorporated Method of lining an inner surface of a tubular and system for doing same
US10413936B2 (en) 2014-02-12 2019-09-17 Baker Hughes, A Ge Company, Llc Method of lining an inner surface of a tubular and system for doing same
US11198152B2 (en) 2014-02-12 2021-12-14 Baker Hughes, A Ge Company, Llc Method of lining an inner surface of a tubular and system for doing same
RU2682637C2 (ru) * 2014-05-15 2019-03-19 Саус Чайна Юниверсити Оф Текнолоджи Способ и устройство для пластикации и подачи путем объемного импульсного деформирования с помощью эксцентрикового ротора
WO2015172751A1 (zh) * 2014-05-15 2015-11-19 华南理工大学 一种偏心转子体积脉动形变塑化输运方法与装置
US11148327B2 (en) 2018-03-29 2021-10-19 Baker Hughes, A Ge Company, Llc Method for forming a mud motor stator
CN109538112A (zh) * 2019-01-04 2019-03-29 中国地质大学（北京） 一种套装拼接式全金属螺杆定子及其加工方法
CN109538112B (zh) * 2019-01-04 2023-09-08 中国地质大学（北京） 一种套装拼接式全金属螺杆定子加工方法

Also Published As

Publication number Publication date
JPH02112683A (ja) 1990-04-25
DE58907494D1 (de) 1994-05-26
EP0353553A2 (de) 1990-02-07
EP0353553A3 (de) 1992-02-05
DE3826033A1 (de) 1990-02-01
ATE104748T1 (de) 1994-05-15
EP0353553B1 (de) 1994-04-20
DE3826033C2 (enrdf_load_stackoverflow) 1992-04-23

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Owner name: GUMMI-JAGER KG GMBH & CIE, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:BOSTEL, KARL-HEINZ;REEL/FRAME:005161/0264

Effective date: 19890904

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FP Lapsed due to failure to pay maintenance fee

Effective date: 19990212

STCH Information on status: patent discontinuation

Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362